If a major asteroid collision in the asteroid belt occurs, on average, 1 time in 100,000 years, then how many major collisions have occurred over the approximately 4 billion year history of the solar system?
A) about 4,000 B) about 4 billion C) about 40,000 D) about 4 million
C
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A person who weighs 550 N empties her lungs as much as possible and is then completely immersed in water while suspended from a harness. Her apparent weight is now 21.2 N. What is her density?
A) 1050 kg/m3 B) 1040 kg/m3 C) 1030 kg/m3 D) 960 kg/m3 E) 56.1 kg/m3
The time of flight of a projectile, fired horizontally over level ground, is independent of its horizontal ________.
Fill in the blank(s) with the appropriate word(s).
Answer the following statement(s) true (T) or false (F)
1. A particle’s mass is the same in all inertial reference frames (even though its speed is not) 2. The components of a particle’s four-momentum are the same in all inertial reference frames. 3. As a particle’s speed approaches that of light, the difference between its relativistic momentum magnitude and its relativistic energy E becomes small (compared to E).
If you know the impulse that has acted on a body of mass m you can calculate
a. its initial velocity. b. its final velocity. c. its final momentum. d. the change in its velocity. e. its acceleration during the impulse.